This is a 203 chassis, not a 202.
The entire panel that surrounds the radio, including the climate control and center vents, needs to come off.
It's pretty involved. The ashtray comes out, then the center vents are pivoted down to remove 2 screws, then up to release 2 clips. There are also a couple wire clips at the bottom edge of the panel. After the panel is removed, there are 4 screws securing the radio and it can be removed. The center vent is the hardest part, there are hidden latches that allow the vents to be tilted up and down farther than normal to access the screws and retaining clips.